Reamer.



PATENTED JUNE 25, 1907.

B. M. NUZUM. REA-MER.

APPLIGATION TILED FEB. 11. 1907.

Alfbornzj.

THE mamas PETERS co. wxsnmamrv, n. c.

BENJAMIN MYERS NUZUM, OF GRAFTON, WEST VIRGINIA.

REAIVIER.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed February 11, 1907. Serial No. 356,667.

' America, and a resident of Grafton, county of Taylor, and State ofWest Virginia, have invented certain new and useful Improvements inReamers, of which the following is a specification.

My invention relates to new and useful improvements in reamers, and ithas for its object to provide an implement whereby both valves andvalve-seats may be renewed, or refaced, and which is particularlyadapted for dressing or refacing steam-nozzles to correct irregularitiesproduced therein by wear and also for refacing the heads ofinjectorspindles, valvedisks, and the like.

As is well known, much trouble is experienced and much time is consumedin repairing valve-seats, valve-disks, the mouths of injectorsteam-nozzles, the heads of injectorspindles, and the like, which havebecome defective from wear, it being quite diflicult to hold and guidethe ordinary forms of reamers or refacing tools employed in such manneras to produce a perfect or effective seat.

By my invention a tool is provided by means of which perfect andaccurate seats may be conveniently and quickly formed, said tool beingadapted for refacing both valves and valve seats, interchangeablecutter-heads being employed.

. In describing the invention in detail, reference is herein had to theaccompanying drawin s, forming a part of this specification, in whic%1Figure 1 is a side elevation of the invention, showing an injectorsteam-nozzle mounted in position for refacing; Fig. 2 is a horizontalsection of the same; Fig. 3 is a detail view of the removablenozzle-holder shown in Figs. 1 and 2; Fig. 4 is a cross section of amodified form of nozzle-holder showing a type of steam-nozzle mountedtherein differing from that shown in Figs. 1 and 2; Fig. 5 is anenlarged detail View, partly in section, showing a valve-disk mountedfor the refacing operation; andFig. 6 is an elevation of a modified formof cutter-head.

Referring to said drawings, in which like reference numerals designatelike parts throu hout the several views1 indicates a yoke liaving a pairof forwardly-extending parallel arms or yoke-members 2 and having anintegral centrally-located rearwardly-directed boss 3, said yoke andboss having a central threaded opening therethrough for the reception ofan eXteriorly-threaded sleevelike guide or feedscrew 4. Provided in theinner or adjacent faces of the yoke-members 2 are oppositely-disposedtransverse channels 5 adapted for receiving the opposite edges of arectangular plate or nozzle-holder 6 which has a central circularaperture 7 therethrough. Said holder 6 is adapted for having seatedtherein an ordinary type of steam-nozzle 8, the hollow stem or shank 9of which projects through the aperture 7 from the inner face of theholder, while the usual integral collar 10 carried by the nozzle servesas a shouldered bearing, resting against said inner face of the holder,as shown.

In use, the stem 11 of the ordinary injector-spindle is employed, theordinary removable head or valve-disk which seats in the steam-nozzlebeing removed from the integral threaded head 12 of said spindle and aconvex cutter-head 13 substituted therefor, the said cutter-headconforming substantially in size to the removed head.

The operation of dressingthe mouth of a steam-nozzle is substantially asfollows: The operator, after substituting the cutter-head .13 for theordinary spindle-head, inserts the stemll of the injector-spindle, rearend first, through the guide or feed-screw 4 from its inner end. Then,having mounted or seated the nozzle in the holder 6 and having mountedsaid holder with its opposite edges in the grooves 5 of theyoke-members, said feedscrew is turned forward to exert a bearingpressure upon the head 12 of the spindle or upon a collar 14 interposedbetween said feed-screw and said head. Then, employing a handle or crank15 mounted upon the outer end of the stem 11, said spindle is rotated.The refacing of the nozzle is effected through the contact of therotating cutter-head with the nozzle mouth, the guide or feed-screwbeing screwed inward as the cutting progresses. An angular head 16 isprovided on the outer end of said feed-screw which facilitates thegrasping of the latter with a Wrench for effecting the turning thereof.The rotation of the nozzle is prevented by the provision in thenozzle-holder 6 of lateral recesses 17, in open communication with thecentral aperture 7, for the reception of the usual lateral lugs 18carried by the type of nozzle illustrated in Figs. 1 and 2. When it isdesired to reface an injector steam-nozzle of a type in which thelateral lugs 18 are ITO omitted, but having an exteriorly-threaded lportion or gland 19, as shown in Fig. 4, a holder 6 having ascrew-threaded aperture 7 therethrough is provided, said gland beingscrewed up tight within said aperture 7 as shown. v

For dressing or refacing valves or the heads of injector-spindles 20, asshown in Fig. 5, the stem 11 of the spindle is mounted as hereinbeforeexplained, and a concave cutter-head 21 is provided, the latterapproaching the nozzle 8 in form in that it has a shank 9 and laterallugs 18 for fitting in the holder 6.

It will be noted that a cutter, such as is shown in Fig. 6, might beemployed for refacing valves and the like, said cutter consisting simplyof a centrally-apertured plate 6 having a concave cutting face 23 formedtherein, said plate being adapted for mounting in the grooves orchannels 5 of the yokemembers 2.

It will be seen from the foregoing that I provide an extremely simple,inexpensive and efficient self-centering implement or tool by means ofwhich both valves and valveseats may be quickly, conveniently andaccurately dressed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

said spindle, a yoke in which said feed-screw is mounted, a pair of armscarried by said yoke in parallel alinement with said feedscrew, saidarms being provided on adjacent faces with transverse grooves, a platehaving the like, a revoluble spindle, a feed-screw for c its oppositeedges slidably mounted in said grooves, said plate having a centralaperture therein, recesses provided in said plate in open communicationwith said aperture for the reception of the lateral lugs carried by astem projected through said aperture, and a cutter for acting upon thepart held between said arms.

In testimony whereof I .aflix my signature in presence of twosubscribing witnesses.

BENJAMIN MYERS NUZUM.

Witnesses W. R. D. DENT, THOMAS NUZUM.

